![](https://www.nhm.uio.no/english/research/scientists-in-the-field/hans-arne-nakrem/feltbilder-hans-arne/02-svalbard-feltundervisning-1200x800.png)
Students on field course on Svalbard. The mountain formation is aptly named “The Fortress”, and consists of weathered limestone from the Carboniferous period, appr. 320 million years ago.
Photo
Hans Arne Nakrem
Students on field course on Svalbard. The mountain formation is aptly named “The Fortress”, and consists of weathered limestone from the Carboniferous period, appr. 320 million years ago.
Hans Arne Nakrem